Reflector.



M. P. ROBBINS, Jn.

REFLEGTOR. f APPLICATION FILED 1120.26, 1912.

Patented Deo. 1, 1914.

i TE STATES PATENT OFFICE.

MARSHALL F. ROBBINS, JR., F BROCKTON, MASSACHUSETTS, ASSIGNOR TO WHEELERREFLECTOR COMPANY, OF BOSTON, MASSACHUSETTS, A (JORPGBATION OF MASSA-CHUSETTS.

REFLECTOR.

Specificationef Letters Patent.

' Patented Dec. 1, 1914.

T o allie/m 'it may concern.'

Be it known that I, MAnsimLL F. Roninxs, Jr., a citizen of the UnitedStates, and a resident of Brockton, county of Plymouth, State ofMassachusetts (whose post-otlice address is 156 Pearl street, Boston,Massachu setts), have invented an Improvement in' Reflectors, of whichthe following description, in connection with the zurcompanyingdrawings, is a specification, like characters on the drawingsrepresenting like parts.

This invention relates to reflectors, being more particularly intendedto provide an improved form of connection between the main body of anelectric light reflector and the canopy or top which incloses andsupports the lamp. lVhile intended more particularly to overcome defectsexisting in outof-door reflectors, such as are used for street lighting,it may `also be applied to reflectors used for interior lighting.

In reflectors of the type referred to it is desirable to have a closeand tight joint between the canopy and the reflector to which it isattached in order to prevent the entrance of moisture to the partsprotected by the canopy. threaded jointl between the canopy and thereflector accomplishes 'the desired result,

While affording the required support to the reflector itself.

In order to protect the reflector and canopy, when the latter are madeof sheet metal or other material susceptible to the action of rust,acids, moisture and the Weather, it is customary to enamel the exteriorsurface of the reflector and canopy as Well 'as such portions of theinterior surface thereof as are apt to be reached by moisture orl otherdamaging elements. In this class of reflector, however, it ispractically diflicult to screw one enameled surface into or againstanotherl withoutcracking or injur-V ing the enamel and, 1l4 cracked orinjured,

the enamel becomes useless to protect the metal. In the illustrativeembodiment of my invention, therefore, I have not only shown aconstruction of canopy and reflector which provides a screw-threadedjoint between two members, but have also shownv such construction aspermits the adjacent surfaces of the canopy and reflector to be enameledWhile at the same time preserving such enamel against injury when theparts are screwed one to the other.

I have .found that a screw- 5 of a lamp holding soc elevation a canopywith its attached depending reflector; and Fig. 2 shows on an enlargedscale a section taken through the canopy and the contained lamp socket.

Referring to the drawings and to the embodiment of the invention thereinshown, I have illustrated a lighting fixture comprising a reflector ladapted to reflect light from the lamp 2. The reflector may be of anysuitable material, but is preferably, though not necessarily, of iron orother metal having its exposed surface enameled either by japan,porcelain enamel or other similar or equivalent protective coatingrepresented bv the heavy line at l1. To the upper part of the reflectoris fixedly secured a supporting rlng 3 by which the reflector isattached to the canopy 1, the latter customarily being suspended from asupporting arm (not shown). The ring `3 may be a part of the hood, butherein for convenience of manufacture it is made separatel therefrom butrigidly attached thereto. Within the canopy Ll there is contained theporcelain lamp base (et G together with the usual lamp supporting partsand connectlons.

VThe canopy 4 is preferably, though not necessarily, formed of iron' orother metal with its exterior surface like that of the ring 3 andreflector 1- enameled by japan'ning, porcelain enamel or otherprotective coating represented at 12. In order to provide a threadedjoint between the canopy and the ring 3 the latter is provided wit anupturned extension 7 which is exteriorly threaded to engage the canopyand the part 'arried thereby and properly to protect the surface of thering 3, the enameling 11 extending not only over the exterior, exposedportion, but over the upturned, threaded portion as well. To suitablyprotect the metal of the canopy the enameling 12 extends notonly overthe exterior surface, but over the interior surface as well. To provideagainst injury to the enameled surface of the neck or the canopy whenthe latter is screwed into position, an intermediate threaded sleeve 8is employed of some other and preferably some softer material. l-lereinl have formed a threaded sleeve 8 of copper and the same is fixedlysecured to and within the shell of the canopy by beading the lower edge9 over the flanged endl() o f the canopy. rlhis rovides a threadedlining of relatively sott material fixed in the canopyand adapted to bescrewed down 'over the threads of the neck 9 without injuring the enamelthereon.

When the canopy is screwed down upon its seat it is held in fixedposition thereon by engagement of the threaded canopy sleeve 9 with thethreaded neck 7.' In this position the enameled surface 11 of the neck 7is protected from injury as is likewise the enameled surface'lQ of thecanopy. The sleeve 8 is preferably copper or zinc so as not to beaffected by moisture. Other arrangements might be rovided for, but bymeans of the construction shown the sides of the canopy are left smoothand present a better appearance.

It will be observed that no screws or breaks are necessary in theenameled surface of the connecting parts and that no chemical action ispossible between the screw-threaded members. Apart, however, from theadvantage of this construction in connection with members having enamelesurfaces, the screw-threaded joint between the canopy and reflectorprovides a weather-` proof joint against the entrance of moisture to thewirind connections of the socket, holds the reflector in absoluterigidity on 4the canopy and permits the reflector to be easily removedfor cleaning without disconnecting the wires. y

While for purposes of illustration I have herein shown and .describedone specific .arianna form of the invention7 it is to be understood thatthe same is not limited to the details of construction or specificarrangement of parts, out that the same may be varied within wide limitswithout departing from the spirit ,of the invention. y Claims...

1. A lighting fixture having a refiector provided with. an enameledsurface, a canopy havinga contained lamp support, said canopy alsohaving an enameled surface and a screw-threaded connection between thecanopy and the reflector, said connection including a threaded sleevebetween the enameled surface of the canopy and the reflector.

2. A lighting fixture provided with an enameled canopy having aconta-ined lam support, lsaid canopy also having an enameljed surfaceand a screw-threaded connection between the canopy and thereflector-carrying member, said connection including a metallic threadedsleeve between the enameled surface of the canopy and the reflector.

3. A. lighting fixture having a reflector provided withA an upturnedthreaded neck having an enameled surface, a threaded having a reflectorsurface, a

Vmetallic sleeve adapted to engage said1 surface and a canopy having anexteriorly and d -interiorly enameled surface within the' open isfixedly secured,

end of which said sleeve be attached to whereby said reflector may saidcanopy. l

ln testimony whereof, name to this specification, two subscribingWitnesses.

MARBHLL if". ROBBTLNS, JR,

'Witnesses Y Claas. M. Conn, if?. S. Hohen:

l have signed my in the presence of

